34th Brigade or 34th Infantry Brigade may refer to:
Australia 34th Brigade (Australia), a unit of the Australian Army
Canada 34 Canadian Brigade Group, a unit of the Canadian Army
Greece 34th Mechanized Infantry Brigade (Greece), a unit of the Greek Army
India 34th Indian Brigade of the British Indian Army in the First World War 34th Indian States Forces Infantry Brigade of the British Indian Army in the Second World War
Romania 34th Infantry Brigade (Romania), a unit of the Romanian Army
Russia 34th Separate Guards Mountain Motor Rifle Brigade, a unit of the Russian Army
Ukraine 34th Marine Brigade (Ukraine)
United Kingdom 34th (South Midland) Anti-Aircraft Brigade 34th Armoured Brigade (United Kingdom) 34th Brigade (United Kingdom) 34th Brigade Royal Field Artillery
United States 34th Combat Aviation Brigade, a unit of the United States Army 34th Division Sustainment Brigade, a unit of the United States Army
See also 34th Battalion (disambiguation) 34th Division (disambiguation) 34th Regiment (disambiguation) 34th Squadron (disambiguation)